Hi. I sprained my ankle 10 days ago and it was put in a cast for 7 days. I have been using an ankle brace for the past 3 days, There was minimal bruising, i.e. only 3 really dark purple bruises and some discoloration on the sides of the ankle, but quite a bit of swelling. The swelling has gone down almost all of the way. I still have pain in the evening when I go to sleep. I am going on a 10 hour flight on Saturday and my question is, should I inject myself with Fragmin, or would taking an Aspirin and wearing compression socks be enough. As a side note, I bruised really badly when injecting the first 4 days, there was intense pain for about half an hour after each injection and there was a dark red circle around the injection site. The pharmacist suggested that I stop injecting and use aspirin.